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Message-Id: <E1LNtEe-0003vh-PO@titan.mandriva.com> Date: Fri, 16 Jan 2009 11:16:00 -0700 From: security@...driva.com To: full-disclosure@...ts.grok.org.uk Subject: [ MDVSA-2009:016 ] xen -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 _______________________________________________________________________ Mandriva Linux Security Advisory MDVSA-2009:016 http://www.mandriva.com/security/ _______________________________________________________________________ Package : xen Date : January 16, 2009 Affected: Corporate 4.0 _______________________________________________________________________ Problem Description: Ian Jackson found a security issue in the QEMU block device drivers backend that could allow a guest operating system to issue a block device request and read or write arbitrary memory locations, which could then lead to privilege escalation (CVE-2008-0928). It was found that Xen allowed unprivileged DomU domains to overwrite xenstore values which should only be changeable by the privileged Dom0 domain. An attacker able to control a DomU domain could possibly use this flaw to kill arbitrary processes in Dom0 or trick a Dom0 user into accessing the text console of a different domain running on the same host. This update makes certain parts of xenstore tree read-only to unprivilged DomU domains (CVE-2008-4405). A vulnerability in the qemu-dm.debug script was found in how it created a temporary file in /tmp. A local attacker in Dom0 could potentially use this flaw to overwrite arbitrary files via a symlink attack (CVE-2008-4993). Since this script is not used in production, it has been removed from this update package. The updated packages have been patched to prevent these issues. _______________________________________________________________________ References: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0928 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4405 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4993 _______________________________________________________________________ Updated Packages: Corporate 4.0: 3785ed3cf9eaf4abb8842713706daeb3 corporate/4.0/i586/xen-3.0.1-3.2.20060mlcs4.i586.rpm 22f6a2eced04422519cbf734df73d453 corporate/4.0/SRPMS/xen-3.0.1-3.2.20060mlcs4.src.rpm Corporate 4.0/X86_64: 450884c01338338d57834dd0b4947805 corporate/4.0/x86_64/xen-3.0.1-3.2.20060mlcs4.x86_64.rpm 22f6a2eced04422519cbf734df73d453 corporate/4.0/SRPMS/xen-3.0.1-3.2.20060mlcs4.src.rpm _______________________________________________________________________ To upgrade automatically use MandrivaUpdate or urpmi. The verification of md5 checksums and GPG signatures is performed automatically for you. All packages are signed by Mandriva for security. You can obtain the GPG public key of the Mandriva Security Team by executing: gpg --recv-keys --keyserver pgp.mit.edu 0x22458A98 You can view other update advisories for Mandriva Linux at: http://www.mandriva.com/security/advisories If you want to report vulnerabilities, please contact security_(at)_mandriva.com _______________________________________________________________________ Type Bits/KeyID Date User ID pub 1024D/22458A98 2000-07-10 Mandriva Security Team <security*mandriva.com> -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iD8DBQFJcKQDmqjQ0CJFipgRAvp9AJ9WPm3IpKfIH9eHsmZ4l60qa1e62QCgmhaY iu0JnPqbcO2Z7C4N6Caj2uI= =MUZq -----END PGP SIGNATURE----- _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
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